The state must get its message out at all costs. I now remember where I read about that tidbit of North Korean life.
"In fact, except for a tiny elite, the DPRK’s 25 million inhabitants are not connected to the Internet. Televisions are set to receive only government stations. International radio signals are routinely jammed, and electricity is unreliable. Freestanding radios are illegal. But every North Korean household and business is outfitted with a government-controlled radio hardwired to a central station. The speaker comes with a volume control, but no off switch."